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Finding the Fourth Proportional to 66,366.80, 99,316.31 and 41,418.57

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Solution

The fourth proportional to 66,366.80, 99,316.31 and 41,418.57 is: 61,981.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,366.80 : 99,316.31 = 41,418.57 : x
  2. Step 2: Convert to fraction form
    66,366.80/99,316.31 = 41,418.57/x
  3. Step 3: Cross multiply
    66,366.80x = 99,316.31 × 41,418.57
  4. Step 4: Simplify right side
    66,366.80x = 4,113,539,330.78
  5. Step 5: Solve for x
    x = 4,113,539,330.78/66,366.80
  6. Step 6: Final answer
    x = 61,981.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.